That was one of a few grievances that the Brazilian featherweight highlighted in a fired-up letter to Dana White and Rousey on Instagram, calling Rousey a "b----" and daring her to meet "halfway" at a 140-pound catchweight:

I am not afraid of Rhonda! I will fight her anywhere and anytime for free - everyone knows I barely make 145- but I am willing to sacrifice and meet her half way at 140- I can't believe dana says I want nothing to do with Rhonda- what he wants me to do is fight Rhonda with both my hands tied behind my back or comatosed-so that she can have a chance-which is what making me fight at 135 is-

to finally shut everyone up - i will fight Rhonda with one hand tied behind my Back at 140lb and still kick her ass and prove that I'm the real champ not her- and let the winner take ALL come on rhonda step up bitch!

This recent outburst stems from an interview that White gave on a recent episode of UFC Tonight on Fuel TV, as the UFC president implied that Cyborg was just afraid to fight in uncharted territory at the 135-pound bantamweight limit.

[Bantamweight is] the only [women's] division we have. It's been real interesting. You know, I've been in the fight game since I was 19 years old and I've been doing this for 15 years and what I get out of this deal with Cyborg is that she wants nothing to do with Ronda Rousey. She does not want to fight Ronda Rousey.

No matter what Cyborg wants, Rousey has made it clear that she has no intention of moving up in weight to fight her rival.

Of course, Cyborg hasn't helped her own position due to a positive test for anabolic steroids from January 2012, which resulted in the former champion being suspended for a year and stripped of her title.

As Rousey previously told Inside MMA, she believes the positive drug test is simply proof that Cyborg was "cheating for her entire career" and "not as awesome as she thinks she is."

Regardless, that superfight could be snuffed out in the planning stages if Rousey loses her title to Liz Carmouche at the upcoming UFC 157 card on Feb. 23 at the Anaheim Honda Center.

Rousey was initially pegged as a 15-to-1 favorite when the match was first lined up—but according to BestFightOdds, that gap has widened even more, making Rousey an 18-to-1 favorite with some online sports books.

UFC 157 will also feature a co-main event title eliminator between Dan Henderson and former light heavyweight champion Lyoto Machida, with the winner assumed to earn a title shot against the victor of Jon Jones vs. Chael Sonnen at UFC 159.

Despite being the only fighter in the lineup with a title belt, Rousey has also drawn some heat from certain MMA fans for headlining UFC 157 in her first bout with the promotion. In turn, this marks the first time in five events over three years that "Hendo" has not main-evented an MMA card.